Dell Mobile Projector M115HD - Manual (Page 40)

How to set-up File Type for Multimedia with USB
NOTE: A USB flash disk must be plugged into the projector if you
want to use the multimedia USB function.
Follow these steps to playback the Photo, Video, or Music files on your
projector:
1
Connect the power cable with AC adapter and turn on the projector
by pressing the power button.
2
Plug in a USB flash disk to your projector.
Using Your Projector 40